Reviews: Old 1867 dated

This hand tool in first pic it is opened up ,2nd has patened date, shows 2 metal triangle screwed into handle. Wear edges in wood on the top of triangle , 3 rd is it folded up part way and shows how someone has added 3 nails to make another triangle. Held together with metal and old square head nuts and bolts.Purchased it at a yard sale, and those people did not know what it is, or what it’s used for, So all you LJ”s out there who may have seen one or have used one please ID for m...